沈植國 白保勛 焦書道 程建明 沈希輝
(河南省林業科學研究院,鄭州,450008) (鄭州市農林科學研究所) (鄭州市城市園林科學研究所) (河南林科園林科技有限公司)
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楊樹林地處理生活污水生態效應1)
沈植國 白保勛 焦書道 程建明 沈希輝
(河南省林業科學研究院,鄭州,450008) (鄭州市農林科學研究所) (鄭州市城市園林科學研究所) (河南林科園林科技有限公司)
為了研究不同污水水力負荷對不同楊樹品種人工林的影響,選擇了‘I-72’、‘歐美107’、‘中林2001’與‘中林46’四個楊樹品種,分別按照3、6、9、12、15 cm·周-15個水力負荷進行污水處理;測定試驗期間各品種地上部分生長量、凋落物量與污染物積累量。結果表明:3~9 cm·周-1水力負荷增加了‘I-72’、‘中林2001’、‘歐美107’的生長量、凋落物量與污染物積累量;水力負荷大于9 cm·周-1時,這3個楊樹品種生長量、凋落物量與污染物積累量隨著水力負荷增加而降低。在這3個品種中,‘中林2001’ 年生長量與污染物積累量最大,‘歐美107’中等,‘I-72’最低。從楊樹生長量與污染物積累量來看,‘中林2001’最適合作為污水處理的植物材料,其次是‘歐美107’、I-72楊,污水處理的適宜水力負荷為6~9 cm·周-1,‘中林46’不適合用于污水處理。
楊樹人工林;生活污水;植物修復;土壤養分與鈉離子質量分數;生長量;污染物積累量
A wastewater treatment experiment was conducted to estimate effects of different hydraulic loading rates on different poplar varieties plantations. Five different hydraulic loading rates (3, 6, 9, 12 and 15 cm·week-1) were applied to four poplar clones (“72”, “107”, “2001” and “46”) during poplar growing seasons, respectively. Biomass variation, litter fall and contaminant accumulation were determined during the experiment. The suitable hydraulic loadings rate (6-9 cm·week-1) resulted in the increase of growth, litter fall and contaminant accumulation compared to control treatment (no irrigation) except for “46”, and high hydraulic loadings (>9 cm·week-1) caused stress on the four poplar varieties. The variations of biomass and contaminant accumulation during the experiment indicated that the poplar “2001” appeared to be more suitable clone as vegetation filter for domestic wastewater treatment than poplar clone “107” and “72”, whereas “46” was unsuitable.
在中國,隨著新型城鎮化與城鄉居民生活水平的不斷提高,生活污水排放量不斷增加,使水環境、土壤與農產品受到了污染。近年來,為了解決日益嚴重的水污染問題,污水土地處理技術快速發展[1,3]。污水土地處理技術建設運營成本低[4-5],非常適合于中國分散的村鎮生活污水處理[6-7]。……p>